What is described as the idea that behaviors followed by positive consequences are strengthened, while behaviors followed by negative consequences are weakened?

A teenage boy begins to drink alcohol as an act of rebellion against his parents. As an adult, he continues to drink, even though his parents have passed away. His adulthood drinking exemplifies

a) perseverative functional autonomy. b) propriate functional autonomy. c) dominance needs. d) play needs.

The sac in which the embryo resides is called the

A. ectoderm. B. amnion. C. germ disc. D. placenta.